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GE K-340 55
TABLE IV
TIME OVERCURRENT UNIT
ONE SECOND
K
(AMPS)
RATING(AMPS)
0.5
-
4.0
125.0
15,625
1.5
-
12.0
260.0
67,600
2.0
-
15.0
260.0
67,600
For
ratings of less than one second,
the rating may be calculated
according to the formula
1=4
where T is the time,
in seconds,
that the current flows.
The continuous ratings of
the time—overcurrent units are shown
in
Table V.
TABLE V
0.5- 4.0 AMP RANGE
TAP
0.5
0.6
0.7
0.8
1.0
1.2
1.5
2.0
2.5
3.0
4.0
[\TING
3.5
3.7
4.0
4.5
5.0
5.5
6.0
7.0
8.0
9.0
10.0
1.5- 12.0 AMP RANGE
TAP
1.5
2.0
2.5
3.0
4.0
5.0
6.0
7.0
8.0
10.0
12.0
RATING
9.5
10.5
11.5
12.5
14.0
15.5
17.0
18.0
19.0
20.0
20.0
2.0- 1 5.0 AMP RANGE
TAP
2.0
2.5
3.0
4.0
50
6.0
7.0
8.0
10.0
12.0
15.0
RATING
10.0 11.0
12.0
13.0
15.0
17.0
18.0
19.0
20.0
20.0
20.0
INSTANTANEOUS UNIT
The
instantaneous
unit
has
a
double—wound
coil
for
operation
on
either
one
of
two
ranges.
Any
setting
obtained
in
the
lower
range
(series connected)
is doubled, within ±3%, when the unit
is connected
for high—range operation (parallel connected).
6
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